ok when i took out the vacuum hose running from the wastegate acuator to the turbo there was no pill in it! wtf but i installed a manuel boost controller anyways and with it fully open i saw around 16 psi and probably would have kept climbing. Why was there no pill in my wastegate line??? i know my turbos are new and have around 25k on them if that makes a difference.

How am i going to control my boost? i read somewhere to take the other vacuum line off the wastegate acuator and plug it up? i didnt do this yet can some one tell me what takeing off that hose does? please help thanks...

btw i am running midpipe downpipe catback intakes and pettit ecu

 

could have been overlooked during the turbo change...or maybe later model turbos where the restrictor is built into the nipple.....check to see what boost you get without the controller....

 

I bet that is what the problem is. I think you have to drill it out in that case.

 

ok i just took off my prespool line and there was no restrictor in that either... how do i tell if the restrictor is built into the turbo nipple ? (or is it the acuator nipple?)
it is hard to see but it looks like it gets smaller at the very very end (inside the nipple near the turbo) if i take a very thin screwdriver (one of those screwdrivers they use to repair watches) it wont go all the way in on the nipple near the turbo but it WILL go all the way in on the acuator nipple. this is really hard to explain!!

 

right now the controller is fully open and the boost is at 16psi. when i had just my catback on and no boost controller it was up to 14 psi so i imagine taking it off wont do any good...

 

I have my manual controller and I still have trouble keeping the boost below 14 on a cold night with it fully open as well....I have a ported engine and full exhaust

 

i managed to get my camera in there and i just took a perfect picture but it won't let me post it. says "website not responding"

 

well since i can't post the pic i think im just gunna go try to drill out the nipples. has anyone removed that little elbow that comes off the turbo housing? I heard it is press-fitted and can be removed. I just dont want to try to take it off and dent it up real bad.

 

I have the manual controler...my prespool is fully open and the other is about 5/8 of a turn out from closed...I have DP, and RB Cat Back and am managing to see 10-8-11

 

Try starting with the valve 1/2 way open. I think mine was 7 turns from opened to closed. From that do 1/4 turns for every 2lbs of boost. You will need some empty roads without cops, a boost gauge and alot of time and patience.

If you are also doing the pre-control, then that's a balancing act that takes alot more time and patience.

boost - closing valve increases.
pre-control - (seesaw/balance) closing increases 2nd turbo boost but decreases 1st and visa-versa. You need to find that sweet spot in the middle.

 

I have the DD manual boost controller...the prespool is home depot...it is only quarter turn from completely closed.....

 

drill that wastegate nipple(on turbo) out...if you can remove it....sounds like the nipples are the restricted ones....get it as open as possible. on a stock car....with no restriction, you should see 7psi... with an intake and exhaust it may be as high as 12-13....(dp,mp,cb and intake)....and for prespool just leave the stock restriction and close the home depot valve to start...slowly open it between runs till you get a smooth transition...with minimal boost drop but no spike...good luck!

 

Late 94 & all 95 models had the restriction in the boost nipple. If your car was unfortunate enough to have been mis-diagnosed by the dealer & had a turbo replacement then the chances of the restrictor being in the turbo snail nipple is pretty darn good.

 

i might be jumpin da gun here, but lets not forget the stock wastegate has a limit, and with a lot of mods the problem is not the boost conbtroller, its the limited wastegate vent space, so you may need to port the wastegate? anyone with me on this?

 

your in trouble

 

ok i just removed the little elbow off of the primary compressor housing (Yes this small elbow IS removable with some vicegrips). Turns out that there were restrictors in the nipples, so i drilled them out. anyways now my prespool and boost controllers are setup im going to do a test run tomarrow if i have some time. ill let you guys know what happens. thanks for the help.

 

hey damian fix that rattling yet?

 

i might be jumpin da gun here, but lets not forget the stock wastegate has a limit, and with a lot of mods the problem is not the boost conbtroller, its the limited wastegate vent space, so you may need to port the wastegate? anyone with me on this?

I'm with ya, and I think that is part of my problem....too much air flow and the wastegate can't dump it out fast enough....with no restriction in the actuator line (manual boost controller full open) the wastegate opens at 7 psi, right? http://www.rx7turboturbo.com/robrobi...controller.htm why then am I still seeing 14 psi on a cold night? I guess that is where the PFC helps, because you can increase the duty cycle on the wastegate control solenoid